Monitor board

for all Studer Revox B77

A total of only 4 electrolytic capacitors with 3 bypass capacitors. When electrolytic capacitors are absolutely necessary, the electrolytic capacitors receive additional bypass capacitors. We use only high-quality, low-noise, low-distortion electrolytic capacitors with low ESR from Panasonic.

At Premium-Hifi, we expect even better channel separation from separating half the operating voltage. When the half-UB is separated for right and left, there is less crosstalk and spatial resolution increases. A measure that doesn't cost much, but makes much more sense than using an exorbitantly expensive cable!

We provide all active components and groups with additional support and blocking capacitors.

For example, all op-amps have a backup capacitor close to the IC, and the circuit board also has a capacitor. Electrolytic capacitors, no matter how good they are, always have a bypass capacitor! In critical locations, they are even designed as film capacitors.

The perforated grid of the previous version is omitted. No modifications or extensions are planned. Four LEDs indicate the operating voltage (green), the enable (yellow), and an additional red peak LED ( 6 dB) for the left and right. The peak LEDs are located directly on the respective trimmers. This makes the peak display particularly easy to adjust.

Separate ground planes, shielding planes for the right and left headphone amplifiers, the mute switch, and the measurement amplifier for the VU meters and peak indicators. The UB signals also come separately from a central point to each amplifier. The new monitor board features wide, 70 µm thick conductor tracks.

You can't avoid calibrating the VU meters and peak indicators! Even if we test and pre-adjust the monitor board, this cannot replace calibrating. You will need a 1 kHz signal source and an accurate AC millivoltmeter for calibrating.